/Engine/Source/Editor/UnrealEd/Public/FbxImporter.h
Get all Fbx mesh objects not under a LOD group and all LOD group node
void FillFbxMeshAndLODGroupArray ( FbxNode * Node, [TArray](API\Runtime\Core\Containers\TArray)< FbxNode * > & outLODGroupArray, [TArray](API\Runtime\Core\Containers\TArray)< FbxNode * > & outMeshArray )